TWI752052B - Optical function inspection system, optical characteristic calculation system, optical function inspection apparatus, optical characteristic calculation apparatus, optical function inspection method, optical characteristic calculation method, program, and recording medium - Google Patents

Abstract

In a coordinate system having a correlation between the luminance contrast value between the luminance of the attention part and the luminance of the background part, and the average value of the luminance of the index including the attention part and the background part, in the color stimuli of each optotype. In the combination of stimulus values, the analysis means for obtaining at least two of the above-mentioned thresholds is performed by obtaining the threshold between the region where the subject has discernment and the region where the subject does not have discernment.

Description

Optical function inspection system, optical characteristic calculation system, optical function inspection apparatus, optical characteristic calculation apparatus, optical function inspection method, optical characteristic calculation method, program, and recording medium

The present invention relates to a visual function inspection system, an optical characteristic calculation system, a method of selecting an optical member, a method of manufacturing an optical member, a method of manufacturing a display member, a method of manufacturing an illuminating device, an optical function inspection device, an optical characteristic calculation device, and a visual inspection device. A functional inspection method, a calculation method of optical properties, a program, and a computer-readable recording medium.

Optical members such as eyeglass lenses have optical properties such as X value, Y value, and Z value of three stimulus values of spectral transmittance and color. Regarding such optical properties, means for calculating the optical properties possessed by each individual's visual function based on objective quantitative evaluation, and means for selecting optical members having the aforementioned optical properties have not yet been developed. For example, Non-Patent Document 1 reports a method of evaluating optical properties using a conventional ophthalmoscope apparatus or system. In this method, the subject is asked to try various optical components one by one.

[Prior Art Literature]

[Non-patent literature]

[Non-Patent Document 1] New Ophthalmology 24(9), 2007, 1179-1186, Fuji Menta

When evaluating optical properties using the conventional optometry test described above, it is possible to select an optical member having effective optical properties under a certain light environment in the optometry test. However, under different light environments, there may be Possibility of not getting the effect. In addition, in the above-mentioned method, the subjects try one after another of various optical members and perform subjective evaluations of optical properties.

An object of the present invention is to consider an optometry inspection including various light environments at the time of inspection, and a method for objectively quantitatively evaluating the optical properties of an optical member established based on the inspection. In addition, the object of the present invention is to establish a method that does not require trial of various optical members when evaluating optical properties.

A visual inspection system according to an example of the present invention includes a coordinate indicating a correlation between a luminance contrast between the luminance of the attention portion and the luminance of the background portion, and a luminance average value of an index including the attention portion and the background portion. In the system, in the combination of the stimulus values of the color stimuli of each optotype, the analysis of at least two of the above-mentioned thresholds is obtained by obtaining the threshold between the area that the subject has discernment and the area that does not have discernment. machine structure.

In addition, the visual inspection system may include a luminance contrast value between the luminance of the focused portion and the luminance of the background portion, an average value of luminance of an optotype including the focused portion and the background portion, and a stimulus of color stimuli of the optotype. At least one different optotype among the combinations of values is sequentially presented to the optometrist of the subject.

In addition, the optometry examination mechanism presents the same optotype to the subject in sequence, and then presents the same optotype to the subject, and then differentiates the combination of the color stimuli from the previously presented optotype. The optotypes can also be prompted to the subjects in sequence.

In addition, the above-mentioned optotype may be displayed on a display device.

Furthermore, the optotype may include a glare portion at a position that enters the subject's field of vision; the glare portion may also be displayed on the display device.

Moreover, you may have the display means which displays on the display apparatus at least one threshold in the said coordinate system.

A visual function test system according to another example of the present invention includes: receiving a luminance contrast value between the luminance of the attention part and the luminance of the background part, the average value of the luminance of the target including the attention part and the background part, and the color stimuli of the target. At least one different optotype in the combination of the stimulus values is presented to the subject in sequence to receive the result of the visual function test; and the coordinate system of the correlation between the mean values of luminance, in each combination of the stimulus values of the color stimuli, the subject has The criticality between the discernible region and the non-identifiable region is an analytical means for obtaining at least two of the above-mentioned criticalities.

An optical characteristic calculation system according to an example of the present invention includes calculation means for calculating the optical characteristics of an optical member for correcting the visual function of the subject based on the inspection results of any of the above-mentioned visual function inspection systems.

In addition, it may be provided with a receiving organization that receives the inspection results of the visual function inspection system.

In addition, the calculation means may calculate the optical characteristics of the optical member based on the inspection result and the spectral distribution of the light source dominated by the subject in the environment in which the optical member is used.

Furthermore, it has an acquisition means for acquiring information representing a light source in an environment surrounding the subject as target information related to the visibility of the subject; and calculating the coordinate system based on the target information. Target value calculation means of target value: The calculation means may calculate the optical characteristics of the optical member based on the inspection result and the target value.

The method of selecting an optical member according to an example of the present invention selects an optical member based on the optical characteristics calculated by any of the optical characteristics calculation systems described above.

In addition, the aforementioned optical properties may be calculated from the aforementioned optical properties of the system receiver.

The manufacturing method of the optical member which concerns on an example of this invention manufactures an optical member based on the said optical characteristic calculated by any of the optical characteristic calculation systems mentioned above.

In addition, the aforementioned optical properties may be calculated from the aforementioned optical properties of the system receiver.

The manufacturing method of the display member which concerns on an example of this invention manufactures an optical member based on the said optical characteristic calculated by any of the said optical characteristic calculation systems.

The manufacturing method of the illuminating device which concerns on an example of this invention manufactures an optical member based on the said optical characteristic calculated by any of the said optical characteristic calculation systems.

A visual inspection device according to an example of the present invention includes a coordinate indicating a correlation between the luminance contrast between the luminance of the attention portion and the luminance of the background portion, and the luminance average value of an index including the attention portion and the background portion. In the system, in the combination of the stimulus values of the color stimuli of each optotype, the analysis of at least two of the above-mentioned thresholds is obtained by obtaining the threshold between the area that the subject has discernment and the area that does not have discernment. Department.

In addition, a combination of the luminance contrast value between the luminance of the focused portion and the luminance of the background portion, the luminance average value of the optotype including the focused portion and the background portion, and the stimulus value of the color stimulus of the optotype is performed. At least one different optotype may be sequentially presented to the inspection unit of the optometry inspection of the presentation unit.

An example of the optical characteristic calculation device of the present invention includes a calculation unit that calculates the optical characteristics of the optical member for correcting the visual function of the subject based on the inspection results of any of the above-mentioned visual function inspection systems.

An example of the visual function test method of the present invention is shown in the note In the coordinate system of the correlation between the luminance contrast between the luminance of the target portion and the luminance of the background portion, and the luminance average value of the index including the target portion and the background portion, the value of the stimulus value of the color stimuli for each visual target is measured. In the combination, at least two of the above-mentioned thresholds are obtained by obtaining the threshold between the region in which the subject has discernment and the region in which the subject does not have discernment.

In addition, at least 1 of the combination of the luminance contrast value between the luminance of the focused portion and the luminance of the background portion, the luminance average value of the optotype including the focused portion and the background portion, and the stimulus value of the color stimulus of the optotype Different optotypes may also be presented to the aforementioned subjects in sequence.

A method for calculating optical characteristics according to an example of the present invention calculates the optical characteristics of an optical member for correcting the visual function of the subject based on the inspection results of any of the above-mentioned visual function inspection systems.

A program according to an example of the present invention causes a computer to execute: a coordinate representing the correlation between the luminance contrast of the highlighted portion and the luminance of the background portion, and the luminance average value of the index including the aforementioned highlighted portion and the aforementioned background portion In the system, in the combination of the stimulus values of the color stimuli of each optotype, the process of obtaining at least two of the above-mentioned thresholds is obtained by obtaining the threshold between the area that the subject has discernment and the area that does not have discernment .

In addition, at least 1 of the combination of the luminance contrast value between the luminance of the focused portion and the luminance of the background portion, the luminance average value of the optotype including the focused portion and the background portion, and the stimulus value of the color stimulus of the optotype Different optotypes may also be presented to the aforementioned subjects in sequence.

Further, the optical characteristics of the optical member may be calculated based on at least one of the inspection result of the process of sequentially presenting the optotype to the subject and the analysis result of the process of obtaining the threshold.

A computer-readable recording medium according to an example of the present invention records any of the above programs.

ADVANTAGE OF THE INVENTION According to this invention, the visual function test which takes into consideration various light environments at the time of inspection can be implemented.

11, 111, 211‧‧‧Computer

14, 114, 214‧‧‧CPU

19‧‧‧Monitor

21, 121‧‧‧Optical standard decision department

22, 122‧‧‧Inspection result memory department

23, 223‧‧‧Analysis Department

24, 224‧‧‧Optical characteristics calculation section

1 is a block diagram showing the configuration of a visual function inspection system according to an embodiment.

[ Fig. 2] Fig. 2 is a diagram illustrating an optotype according to the embodiment.

[ Fig. 3] Fig. 3 is another diagram illustrating the optotype according to the embodiment.

[ Fig. 4] Fig. 4 is a flowchart showing the operation of the visual function inspection system according to the embodiment.

[ Fig. 5] Fig. 5 is a flowchart (continued) showing the operation of the visual function inspection system according to the embodiment.

[ Fig. 6] Fig. 6 is another diagram illustrating the optotype according to the embodiment.

[ Fig. 7] Fig. 7 is another diagram illustrating the optotype according to the embodiment.

[ Fig. 8] Fig. 8 is another diagram illustrating the optotype according to the embodiment.

[ Fig. 9] Fig. 9 is another diagram illustrating the optotype according to the embodiment.

[ Fig. 10 ] Another diagram illustrating the optotype according to the embodiment.

[ Fig. 11 ] Another diagram illustrating the optotype according to the embodiment.

[ Fig. 12 ] Another diagram illustrating the optotype according to the embodiment.

[ Fig. 13 ] Another diagram illustrating the optotype according to the embodiment.

[ Fig. 14] Fig. 14 is a diagram illustrating a CA diagram of an embodiment.

[ Fig. 15] Fig. 15 is another diagram illustrating the CA diagram of the embodiment.

[ Fig. 16] Fig. 16 is another diagram illustrating the CA diagram of the embodiment.

[ Fig. 17] Fig. 17 is another diagram illustrating the CA diagram of the embodiment.

[ Fig. 18] Fig. 18 is another diagram illustrating the CA diagram of the embodiment.

[ Fig. 19] Fig. 19 is a diagram illustrating the spectral distribution of the light source according to the embodiment.

[ Fig. 20] Fig. 20 is another diagram illustrating the spectral distribution of the light source according to the embodiment.

[ Fig. 21] Fig. 21 is another diagram illustrating the spectral distribution of the light source according to the embodiment.

[ Fig. 22] Fig. 22 is a diagram illustrating the spectral transmittance of the embodiment.

[ Fig. 23 ] Another flowchart showing the operation of the visual function inspection system according to the embodiment.

[ Fig. 24] Fig. 24 is another diagram illustrating the CA diagram of the embodiment.

[ Fig. 25] Fig. 25 is another diagram illustrating the CA diagram of the embodiment.

[ Fig. 26] Fig. 26 is a flowchart showing a method of selecting an optical member according to the embodiment.

[ Fig. 27] Fig. 27 is a flowchart showing a method of manufacturing the optical member according to the embodiment.

[ Fig. 28] Fig. 28 is a flowchart showing a method of manufacturing the display member according to the embodiment.

[ Fig. 29] Fig. 29 shows a flow of a method of manufacturing the lighting device according to the embodiment picture.

FIG. 30 is a block diagram showing the configuration of another visual function inspection system and an optical characteristic calculation system according to the embodiment.

<First Embodiment>

Hereinafter, the visual function inspection system according to the first embodiment will be described with reference to the drawings.

As shown in FIG. 1 , the visual function inspection system of the first embodiment includes a computer 11 , an input device 18 , and a monitor 19 .

The computer 11 is a computer on which a visual function inspection program that controls each part of the visual function inspection system is installed. As shown in FIG. 1 , the computer 11 includes a data reading unit 12 , a memory device 13 , a CPU 14 , a memory 15 , an input/output I/F 16 , and a bus bar 17 . The data reading unit 12 , the memory device 13 , the CPU 14 , the memory 15 , and the input/output I/F 16 are connected to each other through a bus bar 17 . Furthermore, the computer 11 is connected to an input device 18 (a keyboard, a pointing device, etc.) and a monitor 19 which is an example of a display device, respectively, through the input/output I/F 16 . In addition, the input/output I/F 16 outputs data for display to the monitor 19 while receiving various inputs from the input device 18 .

The data reading unit 12 is used when reading the above-mentioned visual function test program from the outside. For example, the data reading unit 12 uses a reading device (an optical disk, a magnetic disk, a magneto-optical disk reading device, etc.) that acquires data from a storage medium that can be attached and detached, and performs communication with an external device in accordance with a conventional communication standard. Pass It is composed of communication devices (USB interface, LAN module, wireless LAN module, etc.)

The storage device 13 is constituted by, for example, a storage medium such as a hard disk and a nonvolatile semiconductor memory. In the memory device 13, a visual function check program or various data necessary for the execution of the program are recorded.

The CPU 14 is a processor that collectively controls each part of the computer 11 . The CPU 14 functions as each part of the optotype determination unit 21 , the inspection result storage unit 22 , the analysis unit 23 , and the optical characteristic calculation unit 24 by the execution of the above-mentioned optometry inspection program. The details of each will be described later. In addition, each of the optotype determination unit 21 , the test result storage unit 22 , the analysis unit 23 , and the optical characteristic calculation unit 24 may be constituted by hardware with a dedicated circuit.

The memory 15 temporarily stores various calculation results of the visual function test program. The memory 15 is composed of, for example, volatile SDRAM or the like.

The monitor 19 is, for example, a liquid crystal display device, an organic EL display device, or the like. The monitor 19 can be installed at a distance of, for example, about 1 m from the position where the subject is sitting, for example, at a height of about the line of sight (for example, 1.2 m above the ground) when the subject is sitting.

Before explaining the operation of the visual function test system with the configuration described above, first, the outline of the visual function test will be explained.

The visual function test is a test for acquiring information on optical components for correcting the visual function of the subject. Among them, the correction of the visual function is not limited to the correction aimed at improving the visibility, but includes: correction accompanied by a decrease in the visibility, correction to change the visual function, and optimization of the visual function. corrections, etc. In the optometry test, for example, the subject visually inspects the optotypes displayed on the monitor 19 in sequence (details will be described later), and examines the subject's optotype recognizability (for example, visible/invisible optotypes, feel/no glare, etc.). The light environment at this time is, for example, an environment in which the visibility of the monitor 19 is considered, and the outside light is blocked by a dark curtain indoors, and the indoor lighting is turned on.

In addition, the visual function test includes: the identification inspection of the assumed discomfort glare, and the identification inspection of the assumed disability glare. Discomfort glare refers to a state of discomfort when there is a significant difference in luminance between adjacent portions, or when the amount of light incident on the eyes rapidly increases. In addition, disabling glare refers to a state in which the contrast of retinal images is reduced due to scattered light generated in the ocular tissue, resulting in reduced visual acuity. Details of the various visibility checks will be described later.

Next, the optotype will be described. In the present embodiment, two types of optotypes shown in FIGS. 2 and 3 are used. The optotype shown in FIG. 2 has a circle portion A, which is an attention portion, and a background portion thereof. It is used for the identification check of the above-mentioned assumed discomfort glare. In the visibility test using the optotype shown in FIG. 2 , the subject looks at a position at a certain distance from the optotype, and determines the glare with respect to the circle portion A. As shown in FIG. In addition, in FIG. 2, although one circular part A is shown, you may display on the monitor 19 a plurality of circular parts A of 2 or more as optotypes.

The optotype shown in FIG. 3 has a Landolt ring B, which is an attention portion, and a background portion thereof. The outer side of the optotype is further provided with a ring-shaped glare portion C as a disturbing light, which is used for the identification inspection of the above-mentioned supposed disability glare. Although the Randall ring described here is used to determine the visual force, but it is a ring shape lacking one part in either direction up, down, left or right. In the visibility test using the optotype shown in FIG. 3 , the subject looks at a position at a predetermined distance from the optotype, and determines the direction of the absence of the Randall's ring B. As shown in FIG. In addition, in FIG. 3, although one set of the Randall ring B and the glare portion C is shown, a plurality of sets of two or more may be displayed on the monitor 19 as optotypes.

In addition, the acquisition of the judgment result of the subject can be performed by any method. For example, the test subject may describe the judgment result orally, and after listening to the examiner, the judgment result may be input through the input device 18 and the input/output I/F 16, or at least a part of the input device 18 may be arranged in the In the vicinity of the subject, the subject inputs the judgment result through the input device 18 and the input/output I/F 16 . In addition, it is also possible to use a voice recognition technology to input the judgment result based on the subject's voice.

In the present embodiment, the optotype is displayed on the monitor 19 described above. The optotype determination unit 21 determines which optotype is to be displayed on the monitor 19 , and displays the determined optotype on the monitor 19 via the bus bar 17 and the input/output I/F 16 . The brightness (brightness) of the screen of the monitor 19 can be set to 50% or less, for example, when the maximum brightness is about 300 cd/m ^{2 .} Details of the content of determination by the optotype determination unit 21 will be described later.

The optometry test system is a system for obtaining the optical properties of an optical member that corrects the subject's optometrist based on the result of the optometrist while performing such optometry. Optical components refer to parts that become part of machinery/apparatus and are related to the phenomenon and properties of light (for example, optical lenses, optical filters, etc.), in this embodiment In this state, as an example of an optical member, a visual inspection system for an optical lens will be described.

The operation of the optometry test system described above will be described with reference to the flowcharts shown in FIGS. 4 and 5 .

In step S1, the CPU 14 controls each unit to perform a visual function test. Details of the visual function test will be described with reference to the flowchart shown in FIG. 5 (steps S11 to S18).

The visual function test is the same as the above, including: the identification inspection of the supposed discomfort glare, and the identification inspection of the supposed disability glare. From step S11 to step S13 shown in FIG. 5 , the brightness of the circular attention portion of the optotype presented in a certain background is changed, and the brightness of the glare perceived by the subjects is investigated to determine the visibility of the unpleasant glare. Check. This inspection can be performed in a required time of about three minutes, for example. On the other hand, from step S14 to step S18 shown in FIG. 5 , at least one of Randall's ring B, which is a circular eye-catching part of the optotype presented in a certain background, and a ring-shaped glare part arranged on the outside thereof are changed. For the brightness of one, by examining the brightness threshold of the missing direction of the Randall's ring B that can be recognized by the subject, the visibility inspection of the supposed disability glare is performed. This inspection can be performed in a required time of about 10 minutes, for example.

In step S11, the CPU 14 performs a reference check using the optotype including the circular attention portion. The standard inspection is an inspection that serves as an inspection standard for acquiring optical member information for correcting the visual function of the subject. The reference check in step S11 is a pair of the check of the ND filter effect in step S12 described later and the check of the color filter effect in step S13 Check according to.

The CPU 14 sequentially displays the optotypes including the circular attention portion described in FIG. 2 on the monitor 19 through the optotype determination unit 21 . In the present embodiment, as an example, the optotype determination unit 21 displays on the monitor 19 by sequentially changing the brightness of the circular attention portion from a dark state to a bright state at a constant presentation time. For example, as shown in FIG. 6 , the optotype determination unit 21 changes the brightness of a circular attention portion presented in a certain background to bright in the order of A-0, B-0, C-0, and D-0. state. The test subjects were judged as "feeling glare" when they felt at least a little glare when viewing from a position at a certain distance from the optotype. This glare is caused by uncomfortable glare, and indicates a state in which the difference in luminance between a certain background and a circular portion of interest is significant in the visual inspection. After the reference inspection is completed, the CPU 14 stores the optotype whose brightness is darker in the circular attention part than the optotype determined as "feeling glare" in the inspection result storage unit 22 as the inspection result, and proceeds to step S12.

In addition, the optotype determination unit 21 simultaneously displays, on the monitor 19, for example, four parts of interest with different luminances of A-0, B-0, C-0, and D-0, and the subject compares the four parts of interest and makes a decision. Judgment is also possible.

In step S12, the CPU 14 checks the effect of the ND filter. The inspection of the ND filter effect refers to inspection performed only by reducing the amount of light. In the inspection of the ND filter effect, by comparing the result with the reference inspection in the above-described step S11, it is possible to obtain information on the influence of the light quantity on the subject's visual function. As an example of the ND filter effect, there is a so-called shading effect by sunglasses. The sunglasses referred to here represent the Glasses with lenses that cut all wavelengths (non-specific wavelengths) equally to reduce glare.

Through the optotype determination unit 21, the CPU 14 sequentially displays on the monitor 19 optotypes having a brightness of 50%, for example, with respect to optotypes used in the benchmark test described in step S11 including a circular target portion. Specifically, regarding each optotype (A-0, B-0, C-0, D-0) described with reference to FIG. 6 , as shown in FIG. 7 , the optotype determination unit 21 takes the brightness as A of 50%. -N1, B-N1, C-N1, D-N1 are displayed on the monitor 19 in sequence. The subject performs the same determination as in step S11. After the inspection of the ND filter effect is completed, the CPU 14 stores the optotype whose brightness is darker in the circular eye-catching portion than the optotype determined as "feeling glare" in the inspection result storage unit 22 as the inspection result, and proceeds to step S13. .

In addition, the optotype determination unit 21 simultaneously displays, on the monitor 19, for example, four parts of interest with different luminances A-N1, B-N1, C-N1, and D-N1, and the subject compares the four parts of interest and makes a decision. Judgment is also possible. Next, the optotype determination unit 21 may display the determination results by the subject on the monitor 19 as a list.

In step S13, the CPU 14 checks the color filter effect. The inspection of the color filter effect refers to an inspection performed by changing the spectral characteristics of the monitor 19 . In the inspection of the color filter effect, by comparing the result with the reference inspection in the above-mentioned step S11, it is possible to obtain the first effect, which expresses the effect of the light quantity on the subject's visual function, and the color The information of the 2nd influence expressed by the influence of the combination of the stimulus value of the stimulus. As an example of the color filter effect, there is a so-called color transparency. The effect caused by the glasses of the mirror. The colored lens referred to here refers to an optical lens for eyeglasses having a lens having a spectral transmittance that cuts a specific wavelength.

With the optotype determination unit 21, the CPU 14 sequentially displays on the monitor 19 optotypes having different combinations of stimulus values of color stimuli for the optotypes including the circular target portion used in the benchmark test described in step S11. . For example, the optotype determination unit 21 sets the color stimulus value of R as 50% as shown in FIG. 8 for each optotype (A-0, B-0, C-0, D-0) described with reference to FIG. 6 . The A-C1, B-C1, C-C1, D-C1 of the display are displayed on the monitor 19 in sequence. Next, as shown in FIG. 8 , the optotype determination unit 21 presents the color stimulus value of G as 50% of A-C2, B-C2, C-C2, and D-C2 in sequence, and then sets the color stimulus value of B as 50%. A value of 50% as A-C3, B-C3, C-C3, D-C3 is displayed on the monitor 19 in this order. In addition, each optotype becomes blue when the stimulation value of R is taken as 50%, red when the stimulation value of G is taken as 50%, and yellow when the stimulation value of B is taken as 50%. The subject performs the same determination as in steps S11 and S12. After the inspection of the color filter effect is completed, the CPU 14 stores, as the inspection result, the optotypes whose brightness is darker in the circular eye-catching portion than the optotypes determined as "feeling glare" in the inspection result memory unit 22, respectively, and proceeds to the step. S14. In addition, in step S13, since the inspection is performed using three patterns of optotypes with different combinations of stimulus values of color stimuli, the inspection results also become three types. In addition, the three types of test results are different results depending on the subject's visual function.

In addition, the optotype determination unit 21 may simultaneously display a plurality of attention parts of different colors on the monitor 19, and change the luminance of each attention part, so that the subject may judge the luminance of each color. Also, the attention part is not prompted It is also possible to indicate the part in gray.

In step S14, the CPU 14 checks the size of the Randall ring B. In this test, the size of Randall's ring B is selected so that the subject can easily recognize the direction of the defect in the visual function test to be performed later.

The CPU 14 sequentially displays the optotypes having the Randall ring B on the monitor 19 through the optotype determination unit 21 . In the present embodiment, as an example, the optotype determination unit 21 sequentially changes the size of the Randall's ring B and displays it on the monitor 19 . For example, as shown in FIG. 9 , the optotype determination unit 21 sequentially changes the size of the Randall ring B presented in a certain background in the order of a-S, b-S, c-S, and d-S. The test subject looked at the position at a certain distance from the optotype, and judged the size of the Del ring B at which the missing direction could be easily recognized. After the size inspection of the Randall ring B is completed, the CPU 14 stores the result in the inspection result storage unit 22, and proceeds to step S15.

In step S15, the CPU 14 performs a reference check using the Randall ring B. This standard inspection is an inspection that serves as an inspection standard for acquiring optical member information for correcting the visual function of the subject. The reference inspection in step S15 is a comparison inspection of the inspection of the ND filter effect in step S17 described later and the inspection of the color filter effect in step S18.

The CPU 14 sequentially displays the Randall rings B of the size determined in step S14 on the monitor 19 through the optotype determination unit 21 . In the present embodiment, as an example, the optotype determination unit 21 displays on the monitor 19 by sequentially changing the luminance of the Randall's ring B from a bright state to a dark state. For example, as shown in FIG. 10 , the optotype determination unit 21 makes the RAND presented in a certain background The brightness of the ring B changes to a dark state in the order of a-01, b-01, c-01, and d-01. The test subject viewed from a position at a certain distance from the optotype, and judged the visibility. After the standard inspection is completed, the CPU 14 stores the optotype having a brighter luminance than the optotype determined as "indiscernible" in the Randall ring B as the inspection result in the inspection result storage unit 22, and proceeds to step S16.

Further, the CPU 14 is, for example, in the vicinity of a threshold value showing a critical value between the luminance of the Randall's ring B determined to be "invisible" and the luminance of the Randall's ring B determined to be "recognizable". It is also possible to change the contrast using the simple/transform up-down method. Next, the CPU 14 calculates the folded average value of the stimulus values, and may determine the luminance contrast value and the luminance average value using the calculated average value.

In step S16, the CPU 14 adds the annular glare portion to the outside of the Randall's ring B to perform a reference check. This standard inspection is an inspection that serves as an inspection standard for acquiring optical member information for correcting the visual function of the subject. The reference inspection in step S16 is a comparison inspection for the inspection of the ND filter effect in step S17 to be described later and the inspection of the color filter effect in step S18, as in the inspection in step S15 described above.

The CPU 14 sequentially displays on the monitor 19 the optotype including the Randall's ring B described in FIG. 3 and the annular glare portion disposed outside the optotype through the optotype determination unit 21 . At this time, the brightness of the target determination unit 21 in the glare portion is constant, and on the other hand, the brightness of the Randall's ring B is sequentially changed from a bright state to a dark state. In the present embodiment, the optotype determination unit 21, for example, as shown in FIG. 11, is adapted to a certain brightness presented in a certain background. For the glare part, the brightness of Randall's ring B is changed to a dark state in the order of a-02, b-02, c-02, and d-02. The test subject viewed from a position at a certain distance from the optotype, and judged the visibility. Generally, visibility is deteriorated by the addition of glare parts. This reduction in visibility is due to disability glare. Disabling glare refers to a state in which the contrast of retinal images is reduced due to scattered light generated in the eye, resulting in a decrease in visual function. After the reference inspection is completed, the CPU 14 stores the optotype having a brighter luminance than the optotype determined as "indiscernible" in the Randall ring B as an inspection result in the inspection result storage unit 22, and proceeds to step S17.

In step S17, the CPU 14 checks the ND filter effect as in the above-described step S12.

With the optotype determination unit 21, the CPU 14 sequentially displays the brightness as 50% with respect to the optotype including the Randall's ring B and the annular glare portion disposed outside the optotype used in the reference test described in step S16, for example, as 50%. on monitor 19. Specifically, for each optotype (a-02, b-02, c-02, d-02) described with reference to FIG. 11 , the optotype determination unit 21 takes the luminance as 50% a as shown in FIG. 12 . -N1, b-N1, c-N1, d-N1 prompt in sequence. The subject performs the same determination as in steps S15 and S16. After the inspection of the ND filter effect is completed, the CPU 14 memorizes the optotype having a brighter brightness of the Randall ring B than the optotype determined to be "indiscernible" in the inspection result memory unit 22 as the inspection result, and proceeds to step S18 .

In step S18, the CPU 14 checks the color filter effect as in the above-described step S13.

The CPU 14 uses the optotype determination unit 21 to perform the same operation as in step S16 The optotype including Randall's ring B and the annular glare portion disposed outside of the target used in the above-described benchmark test are sequentially displayed on the monitor 19 , for example, as different combinations of stimulus values of color stimuli. For example, the optotype determination unit 21 sets the color stimulus value of R as 50% as shown in FIG. 13 for each optotype (a-02, b-02, c-02, d-02) described with reference to FIG. 11 . a-C1, b-C1, c-C1, d-C1 are indicated in sequence. Next, as shown in FIG. 13 , the optotype determination unit 21 presents the color stimulus value of G as 50% a-C2, b-C2, c-C2, and d-C2 in order, and then presents the color stimulus value of B in order. A value of 50% is indicated as a-C3, b-C3, c-C3, and d-C3 in sequence. The subject makes the same determination as in steps S15 to S17. After the inspection of the color filter effect is completed, the CPU 14 stores the optotypes having a brighter brightness than the optotypes determined as "indiscernible" in the Randall's ring B as the inspection results, respectively, in the inspection result memory unit 22, and terminates the optotypes. Check, and proceed to step S2 shown in FIG. 4 .

However, the optometry test described so far is only an example, and is not limited to this example. For example, only one configuration may be performed among the visibility inspection assumed to be discomfort glare and the identification inspection assumed to be incapacitated glare, or the configuration to be performed alternately may be inserted in order. In addition, in the visibility inspection of presumed discomfort glare and the visibility inspection of presumed disabling glare, the inspection of the ND filter effect and the inspection of the color filter effect were exemplified, but only any one of them was performed. The composition of the person is also possible. In addition, for example, in the visibility inspection that is supposed to be disabling glare, although the optotype including Randall's ring B described in FIG. 3 and the annular glare portion arranged outside the target are exemplified, the glare portion is other than annular. Shapes are fine too.

In step S2 shown in FIG. 4 , the CPU 14 uses the analysis unit 23 Analysis using CA plots was performed. The CA graph is a two-dimensional evaluation graph of the visibility with the vertical axis as the luminance contrast value (Contrast) and the horizontal axis as the luminance average value (Average Luminance), and is a coordinate showing the correlation between the luminance contrast value and the luminance average value Tie. Regarding the CA map, the inventors have disclosed in detail in Japanese Patent No. 3963299.

The luminance contrast value refers to a value indicating the contrast between the luminance of the attention portion of the optotype and the luminance of the background portion. In the optotype shown in FIG. 2 , the value indicating the contrast of luminance between the circular portion and the background portion, which is the attention portion, corresponds to the luminance contrast value. On the other hand, in the optotype shown in FIG. 3 , as described above, the Randall's ring B is the attention portion, and the outer side of the Randall's ring B and the inner side of the annular glare portion are the background portion. In addition, the luminance average value refers to a value representing the luminance average value of the optotype including the attention portion and the background portion. In the present embodiment, the logarithmic luminance average value is used as an example of the luminance average value. In addition, the luminance contrast value and the luminance average value can be calculated by any calculation method.

In addition, in the optometry test in step S1 (in more detail, steps S11 to S13, and S15 to S18 in FIG. 5 ), at least 1 of the combination of the luminance contrast value, the luminance average value, and the stimulus value of the color stimulus of the optotype is determined. The different optotypes were presented to the subjects in sequence. In addition, the optotypes used in steps S11 and S12 are optotypes having different luminance contrast values and luminance average values. The same applies to steps S16 and S17. In addition, in the optometry test in step S1, in steps S13 and S18, the combination of the stimulus values of the color stimuli is presented to the subject in sequence with the same optotype, and then compared with the optotype presented previously. The combination of the stimulus values of the color stimuli differs depending on the optotype. sequence prompts to the subject.

In addition, as a modification of the above-mentioned visual function test, in the test of the ND filter effect, the luminance is not limited to the exemplified 50%, and the test may be performed with a plurality of step changes. In addition, in the examination of the color filter effect, the combination of the stimulus values of the color stimuli can be arbitrarily applied. In addition, the presentation order of the optotypes may be a change from a state with a large luminance contrast value to a small state, or may be a state in which the luminance contrast value is changed from a small state to a large state. In addition, in the visual function inspection in step S1, an example is shown in which the inspection is performed in the order of the reference inspection, the inspection of the ND filter effect, and the inspection of the color filter effect. -0, the order of A-N1 in FIG. 7 , A-C1 in FIG. 8 , A-C2 , and A-C3 may be presented in order of the optotypes. At this time, in a state where the luminance contrast value is fixed, inspections of the reference, the ND filter effect, and the color filter effect (three types) are performed. Furthermore, it is also possible to sequentially present an optotype in which the combination of the luminance contrast value, the average luminance value, and the stimulus value of the color stimulus of the optotype is changed randomly to the subject.

In the analysis unit 23 in step S2, first, based on the results of the visual function test in step S1 (in more detail, steps S11, S12, S13, S15 to S18 in FIG. 5 ), the luminance contrast value and the luminance average value are calculated, which are marked as CA diagram. Specifically, the analysis unit 23 creates a luminance image of the optotype, and stores it in the test result storage unit 22 as the result of the optometry test. Next, the analyzing unit 23 performs a convolution operation on the luminance image using a matrix, and then calculates a luminance contrast value and a luminance average value. The detailed calculation has been disclosed in detail in Japanese Patent No. 3963299, so it is omitted here.

Fig. 14 shows the results of steps S11 and S12 in Fig. 5 the CA diagram. Point P1 is a marker for the result of the reference check in step S11. The point P1 represents the threshold at which the subject does not experience glare when the brightness of the circular attention portion is sequentially brightened. After marking the point P1, the critical line L1 is determined in the CA diagram. The critical line L1 is a predetermined straight line passing through the point P1, and is determined by means of experiments and calculations. As a basis for determining the critical line L1, for example, there is a study reported in the 2015 Architectural Society of Japan Conference Academic Lecture Summary Collection (Kanto) 40200. The same applies to the subsequent critical lines. Next, in FIG. 14 , the area below the critical line L1 of the CA chart is an area where the subject is discernible, and the area above the critical line L1 is an area where the subject is not discernable.

Point P2 is the one that marks the result of the inspection of the ND filter effect in step S12. The point P2 represents the threshold at which the subject does not experience glare when the brightness of the circular attention portion is sequentially brightened in the step ND filter effect inspection in step S12. In addition, the point P1 and the point P2 in FIG. 14 exists on a straight line L0 _1. After marking the point P2, the critical line L2 is determined in the CA diagram. The critical line L2 can be determined by moving the critical line L1 through the point P2 in parallel. In addition, when determining the critical line L2, the inclination and shape of the critical line L1 may be corrected in whole or in part in accordance with the parallel movement of the critical line L1. Next, in FIG. 14 , the area below the critical line L2 of the CA chart is an area where the subject is discernible, and the area above the critical line L2 is an area where the subject is not discernible. As shown in FIG. 14 , in comparison with the standard inspection using the optotype including the circular attention portion in step S11 , in the inspection result of the ND filter effect in step S12 , a region that is recognizable by the subject occurs. changes, and the subject's visibility changes due to the ND filter effect. In addition, the arrows shown in FIG. 14 represent examples of improvement in the visibility of the subjects.

FIG. 15 shows a CA chart based on the result of step S13 in addition to steps S11 and S12 of FIG. 5 . The point P1, the point P2, the critical line L1, and the critical line L2 are the same as in FIG. 14 . Point P3 is the one that marks the result with the highest effect among the inspection results of the color filter effect in step S13. In step S13, inspection is performed using three types of optotypes having different combinations of stimulus values of color stimuli. At this time, the above-mentioned point P3 is marked on the basis of the inspection result of the optotype with the highest effect, that is, based on the inspection result indicating the brightest brightness of the attention part where the glare is felt. The point P3 indicates the threshold at which the subject does not experience glare when the brightness of the circular attention portion is sequentially brightened in the inspection of the color filter effect in step S13. In addition, the point P1 and the point P3 is also the same as the point P2 present on the straight line L0 _1. After marking the point P3, the critical line L3 is determined in the CA diagram. The critical line L3 can be determined by moving the critical line L1 through the point P3 in parallel. In addition, when determining the critical line L3, the inclination and shape of the critical line L1 may be corrected in whole or in part in accordance with the parallel movement of the critical line L1. Next, in FIG. 15 , the area below the critical line L3 of the CA chart is an area where the subject is discernible, and the area above the critical line L3 is an area where the subject is not discernable. As shown in FIG. 15 , in contrast to the standard inspection using the optotype including the circular attention portion in step S11 , in the inspection result of the color filter effect in step S13 , a region that is recognizable by the subject occurs. changes, and the subject's visibility changes due to the color filter effect. In addition, the arrows shown in FIG. 15 show an example of improvement in the visibility of the subject.

FIG. 16 shows a CA chart based on the results of steps S15 and S16 in FIG. 5 . The point R1 is the one that marks the result of the reference check using the Randall's ring B in step S15. The point R1 represents the critical point at which the subject cannot recognize the optotype when the brightness of the Randall's ring B is sequentially dimmed. After marking this point R1, a critical line L4 is determined in the CA diagram. As a basis for determining the critical line L4, for example, there is a study reported in the 2015 Architectural Society of Japan Conference Academic Lecture Summary Collection (Kanto) 40238. Next, in FIG. 16 , the area below the critical line L4 of the CA chart is an area where the subject is discernible, and the area above the critical line L4 is an area where the subject is not discernable.

The point R2 is the one that marks the result of the reference check for adding the annular glare portion in step S16. The point R2 indicates the threshold at which the subject cannot recognize the optotype when the luminance of the Randall's ring B is sequentially dimmed in the inspection of step S16. In addition, the point R1 and the point R2 exist on the straight line L0 ₂ as shown in FIG. 16 . After marking this point R2, a critical line L5 is determined in the CA diagram. The critical line L5 can be determined by moving the critical line L4 through the point R2 in parallel. In addition, when the critical line L5 is determined, the entire or part of the inclination and shape of the critical line L4 may be corrected in accordance with the parallel movement of the critical line L4. Next, in FIG. 16 , the area below the critical line L5 of the CA chart is an area where the subject is discernible, and the area above the critical line L5 is an area where the subject is not discernable. As shown in FIG. 16 , as a result of the reference test in which the annular glare part was added in step S16 , compared with the reference test including the Randall ring B in step S15 , the area in which the subject was discernable decreased. , the subject's discrimination deteriorated.

FIG. 17 shows a CA chart based on the result of step S17 in addition to steps S15 and S16 of FIG. 5 . The point R1, the point R2, the critical line L4, and the critical line L5 are the same as in FIG. 16 . The point R3 represents the threshold at which the subject cannot recognize the optotype when the luminance of the Randall's ring B is sequentially dimmed in the inspection of the ND filter effect in step S17. In addition, the point R3 also exists on the straight line L0 ₂ as shown in FIG. 17 . After marking this point R3, a critical line L6 is determined in the CA diagram. The critical line L6 can be determined by moving the critical line L4 through the point R3 in parallel. In addition, when determining the critical line L6, the inclination and shape of the critical line L4 may be corrected in whole or in part in accordance with the parallel movement of the critical line L4. Next, in FIG. 17 , the area below the critical line L6 in the CA chart is an area where the subject is discernible, and the area above the critical line L6 is an area where the subject is not discernable. As shown in FIG. 17 , in comparison with the standard inspection using the optotype including the additional ring-shaped glare portion in step S16 , in the inspection result of the ND filter effect in step S17 , the subject has a discernible The area changes, and the subject's visibility changes due to the ND filter effect. In addition, the arrows shown in FIG. 17 represent examples of improvement in the visibility of the subjects.

FIG. 18 shows a CA chart based on the result of step S18 in addition to steps S15 and S17 of FIG. 5 . The point R1, the point R2, the point R3, the critical line L4, the critical line L5, and the critical line L6 are the same as in FIG. 17 . Point R4 is the one that marks the result with the highest effect among the inspection results of the color filter effect in step S18. In step S18, inspection is performed using three types of optotypes having different combinations of stimulus values of color stimuli. Among them, the above-mentioned point R4 is marked based on the inspection result that the effect is the highest, that is, the lowest brightness (darkness) of the Randall's ring B that can be seen. The point R4 indicates the threshold at which the subject cannot recognize the optotype when the luminance of the Randall's ring B is sequentially dimmed in the test of the color filter effect in step S18. In addition, the point R4 also exists on the straight line L0 ₂ as shown in FIG. 18 . After marking this point R4, a critical line L7 is determined in the CA diagram. The critical line L7 can be determined by moving the critical line L4 through the point R4 in parallel. In addition, when determining the critical line L7, the inclination and shape of the critical line L4 may be corrected in whole or in part in accordance with the parallel movement of the critical line L4. Next, in FIG. 18 , the area below the critical line L7 of the CA chart is an area where the subject is discernible, and the area above the critical line L7 is an area where the subject is not discernable. As shown in FIG. 18 , when compared with the reference inspection in which the ring-shaped glare portion is added in step S11 , in the inspection result of the color filter effect in step S18 , the area where the subject is discernable changes, because The color filter effect changes the visibility of the subjects. In addition, the arrows shown in FIG. 18 represent examples of improvement in the visibility of the subjects.

The CA chart described with reference to FIGS. 14 to 18 can also be displayed on the monitor 19 by the analyzer 23 via the input/output I/F 16 . By displaying such a CA map on the monitor 19, the result of the visual function test can be visually presented to the examiner or the subject.

In step S3 , the CPU 14 calculates the optical characteristics by the optical characteristics calculation unit 24 . The optical properties include X value, Y value, Z value, L*a*b*, and the like.

In the present embodiment, as described above, as an optical member for correcting the visual function of the subject, the optical characteristics of the lens for spectacles are required. sex. The X value, the Y value, and the Z value are one of the colorimetric systems defined by CIE (Commission Internationale des Illuminations), and in this document, they are used as one of the evaluation values representing the optical properties of the optical lens.

The optical characteristic calculating unit 24 first selects an optotype to be the basis for calculating the optical characteristic based on the result of the optometry test in step S1 . As described above, in the visual function test in step S1, in the seven processes of step S11, step S12, step S13, step S15, step S16, step S17, and step S18, the test result is stored in the test result storage unit 22. The selection of the inspection results for the calculation of the optical properties can be carried out in any manner. For example, the optical characteristic calculation unit 24 may select the area with the largest visibility in the CA charts described in FIGS. 14 to 18 . After that, the optical characteristic calculation unit 24 may select the test result according to the use purpose of the subject. Hereinafter, as an example, in the inspection of the color filter effect in step S18, the optical characteristic is calculated based on the optotype when the stimulus value of B is 50% (yellow).

After selecting the target to be the basis for the calculation of the optical characteristics, the optical characteristic calculation unit 24 obtains the spectral distribution of the light source corresponding to the target. Here, the light source refers to the one that generates light, and includes not only luminous bodies such as lanterns and the sun, but also reflected light. In the present embodiment, the monitor 19 corresponds to the light source, and the spectral distribution of the light source corresponding to the optotype can be obtained from the spectral distribution of the monitor 19 when the optotype is presented.

19 shows the monitor when the optotype when the stimulus value of B is 50% (yellow) is displayed in the optotype stored in the inspection result storage unit 22 as the inspection result in the inspection of the color filter effect in step S18 The spectral distribution of 19 (hereinafter, referred to as spectral distribution A). Moreover, FIG. 20 shows the spectral distribution (hereinafter, referred to as spectral distribution B) of the light source controlled in the environment that the subject wants to see. In addition, in FIG. 20, the spectral distribution of a light source is shown as an example. In addition, FIG. 21 shows a diagram describing two spectral distributions. In addition, in FIGS. 19 to 21 , the respective horizontal axes represent the wavelengths of light, and the respective vertical axes represent the spectral radiance or spectral radiance at each wavelength.

The optical characteristic calculation unit 24 calculates the spectral transmittance for converting the spectral distribution B into the component light distribution A. Here, the spectral transmittance represents the ratio of the spectral density of the transmitted light beam to the spectral density of the incident light beam. The optical characteristic calculating unit 24 calculates the spectral transmittance for each optical wavelength by obtaining (the numerical value of the vertical axis of the spectral distribution A)/(the numerical value of the vertical axis of the spectral distribution B) for each optical wavelength at a predetermined interval. In addition, the wavelength interval of the light for which the spectral transmittance is calculated may be an equal interval or an unequal interval. For example, the subject may calculate detailed spectral transmittance at narrow wavelength intervals for the wavelength band of important vision, and may calculate approximate spectral transmittance at wide wavelength intervals for other wavelength bands. FIG. 22 shows an example of the calculated spectral transmittance. In addition, the upper limit of the spectral transmittance was set to 1.00, and the calculated result was replaced by 1.00 when the calculated spectral transmittance exceeded 1.00. Next, the optical characteristic calculation unit 24 calculates the X value, the Y value, and the Z value corresponding to the spectral transmittance.

Further, when obtaining the wavelength-dependent characteristic of the spectral transmittance of the optical member used for the visual function of the subject, the optical characteristic calculating unit 24 sets the wavelength region to be determined by the wavelength of each of the R, G, and B lights corresponding to the optotype. main On the premise that the three wavelength regions of the emission wavelength region are constituted, the process of defining the average value of transmittance in each of the three wavelength regions as the same numerical value as the stimulus values of R, G, and B of the optotype is carried out. Also can.

After the CPU 14 calculates the X value, the Y value, and the Z value by the optical characteristic calculation unit 24, a series of processing ends.

As described above, according to the first embodiment, the luminance contrast value between the luminance of the attention portion and the luminance of the background portion, the average luminance value of the index including the attention portion and the background portion, and the stimulus value of the color stimulus of the optotype are calculated. At least one dissimilar optotype in the combination is sequentially prompted to the subject to perform a visual function test. Based on the test results, in the coordinate system showing the correlation between the luminance contrast value and the luminance average value, in each From the combination of the stimulus values of the individual color stimuli, the criticality between the region where the subject has discernment and the region where it is not discernible is obtained. Therefore, since the relationship between the optical characteristics of the optical member and the visibility can be estimated, it is possible to realize the visual function inspection that takes into consideration various light environments at the time of inspection.

Furthermore, according to the first embodiment, the optotype is displayed on the display device. Therefore, the test subject can perform the visual function test in a relatively short time without using a plurality of optical lenses.

<Second Embodiment>

Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In addition, only the part different from the said 1st Embodiment is demonstrated below, and description is abbreviate|omitted about the part which is the same as 1st Embodiment.

The visual function test system of the second embodiment has the same configuration as the visual function test system of the first embodiment. However, the second implementation The morphological visual inspection system acquires target information related to the visibility of the subject, calculates target values based on the acquired target information, and calculates optical characteristics based on the calculated target values.

The operation of the visual function inspection system according to the present embodiment will be described with reference to the flowchart shown in FIG. 23 .

In step S21 , the CPU 14 controls each unit to perform the visual function test, as in step S1 of FIG. 4 described above (in more detail, steps S11 to S18 of FIG. 5 ).

In step S22, the CPU 14 acquires target information through the input/output I/F 18. The target information is information indicating a light source in an environment surrounding the subject. Specifically, it can be considered that when the subject wants to see the problem, the subject perceives a problem in the visibility, or presumably takes a picture of the scene or situation where the problem is perceived. Scenarios and situations in which the subject perceives a problem with visibility refer to, for example, in daily life, the subject perceives glare or darkness, difficulty in recognizing the attention-seeking part such as a guide sign, etc., and difficulty in obtaining a pillar or stairs. Scenes and situations such as the three-dimensional effect of the attention-seeking part. Similarly, the scene and situation in which the subject guesses the problem of discernment refers to the situation and situation that can be inferred by a researcher, a medical practitioner, or the like based on an experiment or what the subject has heard. In any case, by acquiring images of these scenes and situations in advance as object information, it is possible to calculate the optical properties of optical members that correspond to different visual functions for each subject. In addition, any image can be photographed by any method, but it is preferably one that can be converted or approximated to a luminance image (eg, RGB image, YCbCr image, etc.) in view of being used for the above-mentioned CA map.

In addition to the above-mentioned image, any information may be used as long as the information indicates the light source in the environment surrounding the subject. For example, when the subject wants to see the problem, it can be considered as an evaluation value or numerical value or the like indicating the subject's perception of the problem or the situation or situation in which the problem is estimated to be perceived by the subject. The evaluation value indicating the scene and situation in which the subject perceives the problem of discernment is, for example, the subject feels glare or darkness in daily life, and it is difficult to recognize the attention part of the guide sign, etc., and it is difficult to obtain a pillar. Illuminance or luminance measured in scenes and situations such as the stereoscopic effect of a part of interest such as stairs. Similarly, the evaluation value indicating the situation and situation in which the subject guesses the problem of discerning perception refers to the situation and situation that can be inferred based on experiments or what the subject has heard from the researcher, medical practitioner, etc. The illuminance or luminance measured in . In any case, by acquiring the evaluation values of these scenes and situations in advance as target information, it is possible to calculate the optical characteristics of the optical members corresponding to different visual functions for each subject. In addition, although any evaluation value may be measured or calculated in this way, it is preferable to convert or approximate the luminance contrast value and the luminance average value (for example, illuminance, luminance, etc.) in view of use in the above-mentioned CA map.

In step S23 , the CPU 14 performs the analysis using the CA graph by the analyzing unit 23 . The details of the CA diagram are the same as those of the first embodiment.

The analysis unit 23 first calculates a target value based on the target information acquired in step S22. The target value is the luminance contrast value and the luminance average value of the corresponding target information. When the target information is a video, the analyzing unit 23 converts or approximates the video into a luminance video. For example, when the target information is an RGB image, the analysis unit 23 converts the image of the RGB color system into a conventional method. Change to the XYZ colorimetric image, and use the Y image as the luminance image. Next, the analysis unit 23 sets the attention portion and the background portion in the luminance image, and calculates the luminance contrast value and the luminance average value based on the luminance values of these regions.

On the other hand, when the target information is an evaluation value, the analysis unit 23 converts or approximates the evaluation value into a luminance contrast value or a luminance average value. For example, when the target information is illuminance, the analysis unit 23 converts the illuminance into luminance using a known formula, then uses the ratio between the luminance of the attention portion and the luminance of the background portion as the luminance contrast value, and converts the luminance of the attention portion and the background The average value of the luminances of the parts is taken as the luminance average value.

FIG. 24 shows a CA chart based on the result of the visual function test when the visibility test assumed to be unpleasant glare is performed in step S21 . The point P1, the point P2, the point P3, the critical line L1, the critical line L2, and the critical line L3 are the same as those in FIG. 15 of the first embodiment. The point C1 is for marking the above-mentioned target values (the luminance contrast value and the luminance average value) on the CA graph. The point C1 represents a point on the CA graph that the subject desires to be discernible.

On the other hand, FIG. 25 shows another CA map based on the result of the visual function test when the visibility test assumed to be disabling glare is performed in step S21 . The point R1, the point R2, the point R4, the critical line L4, the critical line L5, and the critical line L7 are the same as those in FIG. 16 of the first embodiment. The point D1 is for marking the above-mentioned target values (the luminance contrast value and the luminance average value) on the CA graph. The point D1 represents a point on the CA graph that the subject desires to be discernible.

In step S24 , the CPU 14 calculates optical characteristics (eg, X value, Y value, and Z value) by the optical characteristic calculation unit 24 .

When the optical characteristic calculation unit 24 performs the visibility inspection for the presumed unpleasant glare in step S21, as shown in FIG. The critical line L3 moves the point C1 to the point P4 in the negative direction of the horizontal axis on the CA diagram so as to be included in the discernible region. This point P4 serves as a threshold for including the point C1 corresponding to the target value to a region in which the subject has discernment. Next, the optical characteristic calculating unit 24 calculates the optical characteristic from this point P4. Specifically, first, the difference T of the logarithmic luminance average between the point P4 and the point C1, that is, the ratio of the luminance averages, is calculated. Spectral distribution of the optotype at point P4. After that, optical characteristics are obtained from the spectral distribution corresponding to the point P4 by the same process as the method described in the first embodiment.

When the optical characteristic calculation unit 24 performs the visibility inspection of the incapacitated glare in step S21, as shown in FIG. The way to be included in the discernible region is determined by determining the critical line L9 in the CA map. The critical line L9 can be determined by moving the critical line L4 described in the first embodiment in parallel so that the point D1 is included in a discernible region. Next, as shown in FIG. 25 , the optical characteristic calculating unit 24 obtains the critical line L9 and the point R5 that intersects the _{straight line L0 2 described in the first embodiment.} This point R5 serves as a threshold for including the point D1 corresponding to the target value to a region where the subject has visibility. Next, the optical characteristic calculating unit 24 calculates the optical characteristic from this point R5. Specifically, first, the ratio of the luminance average values between the point R5 and the point R4 is calculated, and the spectral distribution of the optotype corresponding to the point R5 is obtained by multiplying the spectral distribution of the optotype corresponding to the point R4 by the aforementioned ratio. After that, the optical characteristics can be obtained from the spectral distribution corresponding to the point R5 by the same process as that described in the first embodiment.

Next, as in the first embodiment, the optical characteristic calculating unit 24 calculates the X value, the Y value, and the Z value for the spectral distribution of the light source, and then ends a series of processing.

As described above, according to the second embodiment, the information indicating the light source in the environment surrounding the subject is obtained as the target information related to the visibility of the subject, and the target in the coordinate system is calculated based on the target information value. Next, the optical properties of the optical member are calculated based on the inspection result of the visual function inspection and the calculated target value. Therefore, it is possible to correct the subject's visual function by marking the condition of the object that the subject wants to see in real life and analyzing it in the CA map, that is, the subject can distinguish the object to be identified. The optical properties of the optical member are calculated in the manner of the object.

In addition, in each of the above-described embodiments, various possibilities for analysis in the CA map are considered. For example, the subject obtains the spectral distribution governing the light source in an environment using an optical member such as an optical lens, and can simulate the visibility in the use environment by calculating the optical characteristics of the optical member. Moreover, since a CA map can be created for each optical characteristic of an optical member such as an optical lens, various simulations at the time of use are also possible.

In addition, each optotype shown in each of the above-mentioned embodiments is merely an example, and the present invention is not limited to this example. For example, in each of the above-mentioned embodiments Among them, as the attention part of the optotype, a circular part and a Randall ring are exemplified, but other shapes, characters, etc. may be used, and any shape may be used.

In addition, in each of the above-described embodiments, the liquid crystal display device and the organic EL display device are exemplified as specific examples of the monitor 19, but the present invention is not limited to these examples. The spectral distribution can be arbitrary as long as it is known or measurable. For example, a display device having a light source other than the three primary colors of RGB (eg, Yellow) may also be used. Also, a backlight type display device, a self-luminous type display device, or a projection type display device may be used.

In addition, in each of the above-described embodiments, an optical lens is exemplified as an example of the optical member, but the present invention is not limited to this example. For example, a magnifying glass-type optical lens may be used, and as an optical member suitable for individual control of the wavelength of light, a protective layer or a film may be used to adjust the amount of incident light from illumination, window glass, and the like. Moreover, it may be a protective layer, a filter, or a film of the object itself, such as a lighting fixture, a display, a window glass installed in a building, a vehicle, or the like. Furthermore, it can also be applied to building materials or coatings such as floors, walls, and ceilings.

In addition, in each of the above-described embodiments, the visual function inspection system for acquiring information on the optical member for correcting the visual function of the subject has been described, but the following applications are also possible.

For example, as a specific aspect of the present invention, a method of selecting an optical member for selecting an optical member for correcting the visual function of a subject from a plurality of optical members with different characteristics based on the results of the visual function test described in each of the above-mentioned embodiments is as follows: Effective. Fig. 26 shows a method of selecting an optical member Flowchart of an example.

In each process of step S31 to step S33, the same process as each process of step S1 to step S3 of the above-mentioned first embodiment is performed.

In step S34, selection of an optical member is performed based on the optical characteristic (for example, X value, Y value, Z value, or L*a*b*) calculated in step S33. For example, regarding the preliminarily prepared plural optical members, refer to the table corresponding to the preliminarily prepared optical properties (for example, X value, Y value, Z value). Next, an optical member corresponding to the optical properties calculated in step S33 (eg, X value, Y value, Z value, or L*a*b*) or optical properties close to them is selected.

According to the selection method of the optical member described above, the optical member that corrects the visual function of the subject can be selected.

Further, based on the results of the visual function test described in the above-described embodiments, a method for manufacturing an optical member for manufacturing an optical member for correcting the visual function of a subject is effective as a specific aspect of the present invention. FIG. 27 is a flowchart showing an example of a method of manufacturing an optical member.

In each process of step S41 to step S43, the same process as each process of step S1 to step S3 of the above-mentioned first embodiment is performed.

In step S44, the manufacturing conditions of an optical member are determined based on the optical characteristic (for example, X value, Y value, Z value) calculated in step S43, or the optical characteristic close|similar to it.

In step S45, according to the manufacturing determined in step S44 conditions, the manufacture of the optical member was performed.

According to the manufacturing method of the said optical member, the optical member which correct|amends the visual function of a subject can be manufactured.

Further, based on the results of the visual function test described in the above-described embodiments, a method for manufacturing a display member for manufacturing a display member for correcting a subject's visual function is effective as a specific aspect of the present invention. Among them, the display member can be considered to be, for example, various monitors of computers, monitors of smartphones, etc., monitors of tablet PCs, monitors of televisions, monitors of enlarged reading devices (CCTV/Closed Circuit TV), and head-mounted devices. display etc. FIG. 28 is a flowchart showing an example of a method of manufacturing a display member.

In each process of step S51 to step S53, the same process as each process of step S1 to step S3 of the above-mentioned first embodiment is performed.

In step S54, the manufacturing conditions of a display member are determined based on the optical characteristic (for example, X value, Y value, Z value) calculated in step S53, or the optical characteristic close|similar to it.

In step S55, according to the manufacturing conditions determined in step S54, the manufacture of the display member is performed.

According to the manufacturing method of the said display member, the display member which correct|amends the visual function of a subject can be manufactured.

Further, based on the results of the visual function test described in the above-described embodiments, a method for manufacturing an illuminating device for manufacturing an illuminating device that corrects the visual function of a subject is effective as a specific aspect of the present invention. FIG. 29 is a flowchart showing an example of a method of manufacturing a lighting device.

In each process of step S61 to step S63, the same process as each process of step S1 to step S3 of the above-mentioned first embodiment is performed.

In step S64, based on the optical characteristics (for example, X value, Y value, Z value) calculated in step S63, or optical characteristics close thereto, the manufacturing conditions of the lighting device are determined.

In step S65, according to the manufacturing conditions determined in step S64, the manufacture of the lighting device is performed.

According to the manufacturing method of the said illumination device, the illumination device which correct|amends the visual function of a subject can be manufactured.

26 to 29 , the same processing as the steps S1 to S3 of the first embodiment described above is performed to calculate the optical characteristics (for example, the X value, the Y value, the Z value) ), the optical properties (eg, X value, Y value, and Z value) may be calculated by performing the same process as each process of Step S21 to Step S24 in the second embodiment.

In addition, in each of the above-described embodiments, the visual function inspection system constituted by the computer 11, the input device 18, and the monitor 19 is exemplified, but a visual function inspection device in which each part in the above-described embodiments is integrally manufactured also belongs to the present invention. Effective specific form. In addition, an optical characteristic calculating device that calculates optical characteristics based on the results of the visual inspection described in each of the above embodiments is also effective as a specific aspect of the present invention.

In addition, in each of the above-described embodiments, an example in which a series of processing is completed in the visual function inspection system is shown, but the processing of each processing is divided into It is also possible to take responsibility for the composition. For example, as shown in FIG. 30 , a visual function inspection system including a computer 111 , an input device 118 and a monitor 119 , and an optical characteristic calculation system including a computer 211 , an input device 218 and a monitor 219 are configured to divide each process. Can. With such a configuration, for example, a medical institution or the like can be provided with a visual function test system to perform only the visual function test, and a company specialized in analysis can be provided with an optical characteristic calculation system to perform analysis and calculation of the optical characteristics.

The computer 111 shown in FIG. 30 includes each part of a data reading unit 112 , a memory device 113 , a CPU 114 , a memory 115 , an input/output I/F 116 , a bus 117 , and a communication unit 101 . The configurations of the data read-in unit 112 , the memory device 113 , the memory 115 , the input/output I/F 116 , and the bus bar 117 are respectively the same as those of the data read-in unit 12 , the memory device 13 , and the memory 15 in FIG. 1 of the first embodiment. , Input and output I/F16, bus bar 17 are roughly the same. Each part of the computer 111 in FIG. 30 is collectively controlled by the CPU 114 . The communication unit 101 is a transmission/reception unit for performing wired or wireless communication between the computer 111 and an external device. The CPU 114 functions as the optotype determination unit 121 and the inspection result storage unit 122 by executing the optometry test program stored in the memory device 113 . Next, the optotype determination unit 121 and the test result storage unit 122 perform an optometry test in the same manner as in step S1 of the first embodiment or step S21 of the second embodiment. Next, the result of the visual inspection is output from the communication unit 101 via the bus bar 117 and the input/output I/F 116 .

On the other hand, the computer 211 shown in FIG. 30 includes a data reading unit 212, a memory device 113, a CPU 214, a memory 215, an input/output unit Each part of the I/F 116 , the bus bar 217 , and the communication unit 201 . The configurations of the data read-in unit 212 , the memory device 213 , the memory 215 , the input/output I/F 116 , and the bus bar 217 are respectively the same as those of the data read-in unit 12 , the memory device 13 , and the memory 15 in FIG. 1 of the first embodiment. , Input and output I/F16, bus bar 17 are roughly the same. Each part of the computer 211 shown in FIG. 30 is collectively controlled by the CPU 214 . The communication unit 201 is a transmission/reception unit for wired or wireless communication between the computer 211 and an external device. The CPU 214 functions as the analysis unit 223 and the optical characteristic calculation unit 224 by executing the optical characteristic calculation program stored in the memory device 213 . Next, the analysis unit 223 and the optical characteristic calculation unit 224 perform the analysis of the CA map and the optical characteristics in the same manner as at least one of Step S2, Step S3 in the first embodiment, Step S22, Step S23, and Step S24 in the second embodiment. calculated. In addition, the analysis unit 223 and the optical characteristic calculation unit 224 acquire the result of the optic function test received by the communication unit 201 through the input/output I/F 216 and the bus bar 217, and perform CA based on the acquired result of the optic function test. Analysis of graphs and calculation of optical properties.

In addition, each of the optotype determination unit 121 , the test result storage unit 122 , the analysis unit 223 , and the optical characteristic calculation unit 224 may be constituted in hardware by a dedicated circuit.

In addition, a visual function inspection program or an optical characteristic calculation program is also effective as a specific aspect of the present invention. These programs can be stored in a computer-readable medium, or stored in a server on the Web, and can be downloaded to a computer through the Internet.

In addition, the techniques of the above-described embodiments are also expected to be applicable. to a medical machine or medical device.

The features and advantages of the embodiments should be clarified from the above detailed description. This is for the features and advantages of the above-mentioned embodiments within the scope of the patent application without departing from the spirit and the scope of the rights. In addition, if it is a person with ordinary knowledge in this technical field, it should be easy to think through improvement or a change. Therefore, it is not intended that the scope of the inventive embodiment is limited to the above-mentioned range, and appropriate improvements and equivalents included in the range disclosed in the embodiment may be included.

11: Computer

12:

13:

14:CPU

15:

16:

21: Optotype decision department

22: Inspection result memory section

23: Analysis Department

24: Optical characteristics calculation section

Claims (21)

A visual function inspection system, comprising: in a coordinate system representing a correlation between the luminance of the attention portion and the luminance of the background portion, and the correlation between the luminance average value of the optotype comprising the above-mentioned attention portion and the above-mentioned background portion, An analysis means that obtains at least two thresholds between an area that is discernible and an area that is not discernible by the subject in accordance with the combination of stimulus values of color stimuli for each optotype. The visual inspection system according to claim 1, comprising: a luminance contrast value between the luminance of the noted portion and the luminance of the background portion, the average value of the luminance of the optotype including the noted portion and the background portion, and the luminance of the optotype. At least one different optotype in the combination of the stimulus values of the color stimuli is sequentially presented to the subject's optometry examination mechanism. The optometry inspection system according to claim 2, wherein the optometry inspection means presents the same optotype to the subject in sequence with the combination of the stimulus values of the color stimuli, and then presents the optotype with the previously presented optotype. The optotypes with different combinations of stimulus values compared to the color stimuli are presented to the subjects in sequence. The visual function inspection system as described in any one of claim 1 to claim 3, wherein, The aforementioned optotype is displayed on the display device. The optometry inspection system according to claim 4, wherein the optotype includes a glare portion at a position entering the subject's field of vision, and the glare portion is also displayed on the display device. The visual function inspection system according to any one of Claims 1 to 3, comprising: a display means for displaying at least one threshold on the display device in the coordinate system. A visual function inspection system, having: accepting the luminance contrast value between the luminance of the attention portion and the luminance of the background portion, the luminance average value of the optotype comprising the aforementioned focus portion and the aforementioned background portion, and the stimulus value of the color stimuli of the optotype. At least one different optotype in the combination is presented to the subject in sequence to receive the results of the visual function test; and based on the results of the above-mentioned visual function test, the above-mentioned luminance contrast value and the above-mentioned luminance average value are displayed in the In the coordinate system of the correlation, corresponding to each combination of the stimulus values of the color stimuli, at least two critical analysis means are obtained between the region where the subject has discernment and the region that does not have the discernment . An optical characteristic calculation system, having: Calculation means for calculating the optical characteristics of the optical member for correcting the optic function of the test subject is obtained from the inspection result of the optic function inspection system described in any one of Item 7. The optical characteristic calculation system as described in Claim 8 has an acceptance means which accepts the inspection result of the visual function inspection system. The optical characteristic calculation system according to claim 8 or claim 9, wherein the calculation means calculates the optical property based on the inspection result and the spectral distribution of the light source dominated by the subject in an environment where the optical member is used. Optical properties of components. The optical characteristic calculation system according to claim 8 or claim 9, comprising: acquisition means for acquiring information representing a light source in an environment surrounding the subject as object information related to the visibility of the subject and target value calculation means for calculating a target value in the coordinate system based on the target information; in the calculation means, based on the inspection result and the target value, the optical properties of the optical member are calculated. An apparatus for inspecting visual function, comprising: a luminance indicating a portion of interest In the coordinate system of the luminance contrast value with the luminance of the background portion and the correlation between the luminance average values of the optotypes including the aforementioned attention portion and the aforementioned background portion, the combination of stimulus values corresponding to the color stimuli of each optotype is obtained. An analysis unit that finds at least two critical areas between an area in which the subject is discernible and an area in which the subject is not discernible. The optometry test device according to claim 12, comprising: a presentation unit for presenting an optotype to the subject; At least one different optotype in the combination of the average luminance of the optotype in the background part and the stimulus value of the color stimulus of the optotype is sequentially presented to the inspection unit of the optometry test of the presentation unit. An optical characteristic calculation device comprising: a calculation unit for calculating an optical characteristic of an optical member for correcting the visual function of the subject based on the inspection result of the visual function inspection device as set forth in claim 12 or claim 13. A method for inspecting visual function, in a coordinate system representing the luminance contrast value between the luminance of the attention portion and the luminance of the background portion, and the correlation between the average value of the luminance of the optotype comprising the aforementioned attention portion and the aforementioned background portion, corresponding to each Combining the stimulus values of the color stimuli of each optotype, at least two thresholds are obtained between the region where the subject has discernment and the region where it is not discernible. The method for inspecting visual function according to claim 15, wherein the luminance contrast value between the luminance of the noted portion and the luminance of the background portion, the average luminance of the optotype including the noted portion and the background portion, and the luminance of the optotype are compared. At least one different optotype in the combination of the stimulus values of the color stimuli is presented to the subject in sequence. An optical characteristic calculation method for calculating the optical characteristics of an optical member for correcting the visual function of the subject based on the inspection result of the visual function inspection method as described in claim 15 or claim 16. A program that makes a computer execute, is executed in a coordinate system representing the luminance contrast value between the luminance of the attention portion and the luminance of the background portion, and the correlation between the average value of the luminance of the optotype comprising the foregoing attention portion and the foregoing background portion , and corresponding to the combination of the stimulus values of the color stimuli for each optotype, at least two critical processes are obtained between the subject's distinguishable area and the non-discriminative area. The program according to claim 18, wherein the luminance contrast value between the luminance of the target portion and the luminance of the background portion, the average value of the luminance of the optotype including the target portion and the background portion, and the stimulus of the color stimuli of the optotype are calculated. At least one different optotype in the combination of values is presented to the subject in sequence. The program according to claim 18 or claim 19, wherein the optical member is calculated based on at least one of an inspection result of a process of sequentially presenting the optotype to the subject, and an analysis result of a process of obtaining the criticality optical properties. A recording medium which is a computer-readable recording medium on which the program described in any one of claim 18 to claim 20 is recorded.

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